Language learning is ripe for disruption. Rosetta Stone sucks. Pimsleur is just okay but can be improved.
I don't work there, I just use it, but I think it's great for non-tonal languages (as in, it doesn't do Mandarin great).
There are a lot of well known products out there like Rosetta Stone but there are opportunities for startups to create more compelling and entertaining products at lower price points. We really wanted to create something that was also fun and addictive to play which is different to traditional language learning products.